Nipple scrubber



FIG. 1 is a perspective view of our design for a nipple scrubber;

FIG. 2 is a side elevation view of the design of FIG. 1;

FIG. 3 is a side elevation view of the design of FIG. 1 rotated 90° from the view of FIG. 2;

FIG. 4 is a front end view of the design of FIG. 1; and,

FIG. 5 is a handle-end view of the design of FIG. 1. 

The ornamental design for a nipple scrubber, as shown and described. 